I have had the following information from Deborah Cameron:
Percy Haselden was born in Toxteth, Liverpool and his birth was registered in the September quarter of 1895.
Percy joined the Kings Liverpool Regiment and was killed on 30th July 1916 in Flanders. He is remembered on the Thiepval Memorial, Somme, Picardie, France.
Percy's poems were published by Erskine Macdonald in 1917 under the title "In the wake of the Sword". His poem "Searchlights on the Mersey" was published in "The Fiery Cross: an Anthology" edited by Mabel C. Edwards and Mary Booth and published by Grant Richards in 1915.
With many thanks to Deborah for her kind help.
If anyone knows anything more about Percy or if they have a photograph of him, please get in touch.